Eco Friendly Processing 1

8/8/2019 Eco Friendly Processing 1

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Protection of environment. Protection of the wearer.


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A management tool comprising a systematic, documented,

periodic & objective evaluation of how well environmentorganization, management & equipment are performing with

the aim of contributing to safeguarding the environment.

Eco-Auditing Advantage:

Systematic evolution of the status.

Cost reduction due to systematic analysis-material input and

reduction in wastage.

Legal safety.

Improvement of the environmental protection within the

industry.

Improvement of reliability.

Optimal use of resource and raw material


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Metalcontaining

dyes

Surfactants

phosphates


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Desizing-

It is carried out by using amylase type of enzyme by

pad batch method.

Recipe:

Amylase enzyme -- 2-5 gpl

Acetic acid [30%] -- to maintain pH 4.5 to 5.5

Common salt -- 10 gpl

Anionic wetting agent -- 0.5-1 gpl

Temperature -- 600C

Expression -- 95-100%


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No risk of mildew on cloth.

It hydrolyzes starch but does not tender the cellulose.

It is safe method.

This method is method is faster than other methods of

desizing.


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Bioscouring-

Only non-cellulosic impurities are removed without

damaging the fiber.

Recipe:

Baylase EVO -- 0.5% (w/v)

pH -- 8-10

Temperature -- 550C

Time -- 4-6 hr


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Test parameter Bio-scouring Conventionalscouring

pH 8 9.5 13 14

Temperature 50 - 600C [exact 75 - 900C] 95-1000C [ 1300C]

Weight loss < 1.5% 3 8%

Handle Very soft Harsh, rough

TDS [ Total Dissolved

Solids]

25 50% 100%

BOD 20 40% 100%

COD 20 45% 100%


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Milder process, no damage to cellulose.

Readily biodegradable byproducts.

Less load on ETP. Softer handle.

Less weight loss.


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Biopolishing-Following is the recipe,

Enzyme -- Cellulase

Equipment -- jet dyeing or garment dyeing m/c

pH -- 4.5 6

Temperature -- 45 600

CTime -- 30 60 min.

Advantages of Biopolishing:

Increase resistance to pilling.

Gives clear surface.

Improved drape ability.


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Techniques of conservation Counter-current washing

Use of standing bath

Reuse of final rinse water from dyeing for dye bath

make-up Reuse of soaper waste water

Reuse of scouring rinses for desizing

Reuse of mercerizing or bleach wash water for

scouring or desizing


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Following are some of the contaminants,

Carcinogenic amines

Heavy metals

Pesticides

Pentachloro phenol

Formaldehyde


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Contaminants Sources Substitutes

Carcinogenic amines 20% of azo dyes. Natural dyes.Dyes purchased from

reputed manufacturer.

Heavy metals Metal complex dyes Cr,Co, Cu and NiDye stripping agent.

Eco friendly mordantslike alum, FeSO4Direct dyes should notused for baby cloth.

Pesticides Cotton plantation. Organic cotton.Neem oil.

Pentachlorophenol Preservative in sizingand printing.

Thiazole derivatives likemercapto benzothiazole.

Formaldehyde Urea- formaldehyde

type of resin in finishing.Reactive softener, Mfg ofsynthetic dyes.

Free formaldehyde resin

like DMDHEU.Zinc suphoxylateformaldehyde replacedby rongolite in printing.


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1) Formaldehyde-

equipments used are,

UV-VIS spectrometer

High Performance Liquid Chromatography (HPLC)

2) Pesticides-

Extraction &analysis by Gas Chromatography with

Electron Capture Detector (ECD)

Mass Spectrometer


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Parameters Max limit, mg/kg in ppm

Babyclothing

Close to skin Outer wear

20 75 300

0.1 0.1 0.110 10 10

0.5 0.5 0.5

150 150 150

1 1 1

50 50 50

Free formaldehyde

Heavy metalsLead

PCP

Volatile hydrocarbons

PesticidesAmines released from azo-dyes


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When whole world is concerned about taking care of

the environment, eco-friendly processing will alsohelp in playing a major role in doing so.


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Documents

Eco Friendly Processing 1